JPS60195234A - Laying and leveling device for soil - Google Patents

Abstract

PURPOSE:To layer and level up soil and sand to uniform thickness by providing a driver to regulate the height of a leveler, a level detector to rub the surface of ground, and a controller to operate the driver in such a way as to make the level coincide with a set value. CONSTITUTION:When leveling soil 5 to a desired thickness (h), a thickness setter 18 is adjusted to make setting in such a way as to make the height from the ground 6 to the downside of a blade 9 the value (h). When a motor grader is run, since a level detection bar 11 is pulled downwards by a return spring 12, the tip of the bar 11 is always buried in the layer of soil 5 and moved while rubbing the ground 6. In case that the height between the tip of the bar 11 and the downside of the blade 9 is deviated from the set value (h), the deviation between the detected value of the sensor 10 and the set value (h) is transmitted from a mixer 19 to an arithmetical circuit 16. A correction output signal is then sent to an oil-pressure driver 15, and a lift cylinder 3 is operated so that the difference in height between the tip of the bar 11 and the downside of the blade 9 is restored to the set value (h).

Description

[Detailed description of the invention] The present invention relates to a device for leveling earth and sand.

When spreading earth and sand to a certain thickness on ground that has been compacted to a certain extent, such as on a dirt course at a racetrack, conventionally the thickness of the earth and sand that has been spread on the ground is measured and the thickness is measured by the motor grader operator. The operator had to adjust the vertical height of the motor grader's blade by contacting the operator from time to time. Several workers were needed to contact the

In order to automate this leveling work, as shown in Figure 1, a laser beam (03) is emitted from a laser transmitter (01) parallel to the ground (02) K, and this laser beam (03)
is received by a laser receiver (05) mounted on the motor grader (04), and the blade (07) is moved upward by extending and contracting the lift cylinder (06) according to a control signal from the laser receiver (05). A method has been proposed in which the soil (08) spread on the ground (02) is leveled to a constant thickness. Since it is a curved surface, it was not possible to make the thickness of the earth and sand (08) constant across its width.

In addition, as shown in Fig. 43, at 5, the pantograph (010)
The control signal from the pantograph (010) expands and contracts the lift cylinder (06), which moves the blade (07) up and down to keep the soil (08) spread on the ground (02) constant. An attempt was made to level the lines so that the
Another drawback is that it takes a lot of effort and time to stretch it to a predetermined height.

The present invention was invented to solve the above problems, and the gist thereof is to provide a leveling device such as a blade, a drive device for adjusting the vertical height of both ends of the leveling device, Level detection rods are installed at both ends of the leveling device and penetrate into the layer of granular materials such as earth and sand covering the foundation to scrape the surface of the foundation, and the levels detected by the above detection rods are preset. The present invention provides an apparatus for leveling earth and sand, characterized in that it includes a control device that drives the drive device so that the set value is reached.

In the present invention, the level is detected by a level detection rod that penetrates into the layer of powder and granular materials such as earth and sand that covers the foundation and scrapes the surface of the foundation. There is no need for transmitters, tensioners, etc. Then, the control device drives the drive device so that the level detected by the level detection rod becomes a preset value, and the vertical height of the leveling device Ω can be automatically adjusted. The leveling work can be done by just one operator, and the work does not require any skill and can be completed in a short time. In addition, level detection rods are installed at both ends of the leveling device and can detect the level at both ends of the leveling device, and the signals from this drive the drive device to adjust the vertical height of both ends of the leveling device at the same time. This makes it possible to spread earth and sand to a uniform thickness in the width direction on a base having a medium-height curved surface such as a dirt course.

Hereinafter, the present invention will be specifically explained with reference to an embodiment shown in FIGS. 4 and 5.

In Figure 4, (6) is the ground, (5) is the earth and sand spread on the ground (6), (9) is the blade, (7) is the control device, and <11) is the rotating shaft on the bracket α. (The level detection rod whose base end is pivoted via 27s, QO is the rotation axis C!
The sensor that detects the movement of the level detection rod αυ through the sensor is a return spring that connects the rail detection rod Ql) and the bracket α□□□. Bracket (li
K pin α4, the blade (
9) and rotates around the pin 0. Q8 is the leveling thickness setting device, and this setting value is set at mixer 0.
Here, the output is compared with the output sent from the sensor ([C), and the deviation between the two is determined. This deviation is sent to the hydraulic drive device (Lω) via the arithmetic circuit, and the lift cylinder (3) is expanded and contracted by a command from the hydraulic drive device α3, and the lift cylinder (3) is moved to the circle roll bar (211
, Circle C? Play via G etc.)' (9) up and down. C! 41 is a zero point setter and this setting value is set by mixer C.
2ω, where it is compared with the output sent from sensor α(ll) to determine the deviation between the two, and this deviation is displayed on the display aη.

Details of the control device are shown in Fig. 5, and in Fig. 5, ←
sensor, αω is a hydraulic drive device, <1 word display device, a is a spreading leveling thickness setting device, the handle is a mixer, (1 town ↓ calculation circuit, (5) is an output inversion circuit, (ha) ) is an integrator circuit, 弼 is a v-f converter, (to) is a monostable multivibrator,
01) is an output amplifier for driving a solenoid valve, (c) is 0N-O
FF control solenoid valve, (Foundation) is zero point setter, @ is mixer, α
7) is a display, 04 is an analog-digital converter,
(to) indicates the display LED.

Therefore, when leveling the earth and sand (5) to the desired thickness h, adjust the thickness setting device α ladle and move the blade (9) from the ground (6).
Set so that the height to the bottom surface of is h. When the motor grader is run in this state, the tip of the shield detection rod Ql) will sink into the layer of earth and sand (5), but it will be pulled downward by the return spring α so as not to dig into the ground (6). Therefore, the tip of the detection rod aυ is always buried in the layer of earth and sand (5) and moves while scraping the ground (6).

If the difference in firmness between the tip of the detection rod α9 and the bottom surface of the blade (9) deviates from the set value, the deviation between the value detected by the sensor and the set value is calculated by the mixer α. circuit ae
A correction output signal is sent to the hydraulic drive device αω, and the lift cylinder (3) operates in a direction to reduce the height difference between the tip of the detection rod aυ and the lower surface of the plate (9) by hK. That is, when the set value is first set with the setting device (Is), the difference in height between the tip of the detection rod αυ, that is, the ground (6), and the bottom surface of the blade (9) is automatically adjusted to h. Ru.

By attaching detection rods aυ to both ends of the blade (9) and controlling the left and right lift cylinders (3) individually, the lower surfaces of both ends of the play (9) are determined to have a height h from the ground (6). It will be automatically adjusted accordingly.

Therefore, after the blade (9) travels, the thickness of the earth and sand (5) becomes h almost uniformly. When you want to know the amount of vertical movement of the blade (9), check the zero point setter (24) when the blade (9) is at an appropriate height, and set the LED display on the display αη to O. When the blade (9) moves up and down from this reference point, the deviation between the detected value of the sensor (10) and the set value is transmitted to the mixer and above all to the display (17), and the blade (9) moves up and down. The amount will be displayed. In Figure 5, the setting value set by the setting device (IQ) and the sensor <
The detected values of 11 are compared in a mixer and the deviation thereof is output. Its output is the solenoid valve (2119 carp v (26Sa
) and a circuit 09 for driving the coil (z6sb). Negative deviation output is 0
4) side, is integrated in the integrating circuit country, and is inverted to positive.

This output is the v-f converter CI! 9) A trigger pulse is output to the multivibrator (to) at the moment the value exceeds the set value set in step 9). With this trigger pulse, the multivibrator outputs a stable rectangular wave to drive the electromagnetic valve Q (9). This output is amplified by the output amplifier 01 and drives the coil (26Sa), and the electromagnetic pulp Ce [Drive the lift cylinder (3) upwards. The positive deviation output +Sa enters the aS side, is converted into a negative output by the output inverting circuit (27), is integrated by the integrating circuit 2, and is inverted to positive. This output is the v-f converter C! A trigger pulse is output to the multi-biscillator at the moment the set value within ω is exceeded. With this trigger pulse, the multivibrator Ool outputs a stable square wave for driving the solenoid valve (20).

This output is amplified by an output amplifier l31) and
(26Sb) to drive the lift cylinder (3) downward via the electromagnetic balzo CO. In the case of a differential output on both the positive and negative sides, when the detected value of the sensor Q (ll) returns to the set value and the deviation output becomes zero, the drive output signal of the lift cylinder (3) becomes O and the lift cylinder (3) stops.

In this way, with this device, the operator only needs to first set the thickness h of the earth and sand layer, and the left and right distances can be adjusted by 7 toss.
3) moves automatically to hold the blade (9) at a predetermined height, which greatly reduces work time and allows operators to level the earth and sand without requiring any skill. I can do it.

In the above embodiment, the level detection rod αI) was pulled by the return spring ←, but instead of this, an air cylinder or hydraulic cylinder may be used, or the level detection rod (
By increasing the weight of the IQ, the level detection rod I may be allowed to penetrate into the layer of earth and sand.

In addition, in the above embodiment, two lift cylinders (3) on the left and right are used as drive devices, but instead of this,
The vertical height of both ends of the blade may be adjusted by changing the height and inclination of the blade using a mechanical or electrical drive device. In addition, the device of the present invention can of course be widely used for spreading powder and granular material to a constant thickness, such as spreading sand on a dirt course or sand in a settling basin or a passing basin. be.

[Brief explanation of the drawing]

Figure 1 is a side view showing the conventional method for leveling soil, etc., Figure 2 is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a conventional method for leveling other soil, etc. 4 and 5 show one embodiment of the present invention, FIG. 4 is a side view of the main part, and FIG. 5 is a wiring diagram showing details of the control device. Leveling device...(9), Drive device...(3), Base/
...(6), Powder material...(5), Level detection rod...
(11), control device...(7). Sub-agents: 3 patent attorneys and non-Kaihon important literary figures

Claims (1)

[Claims] A leveling device such as a blade, a drive device that adjusts the vertical height of both ends of the leveling device, and a drive device installed at both ends of the leveling device that penetrates into the layer of powder and granular material such as earth and sand that covers the foundation. a level detection rod that rubs the surface of the base, and a control device that drives the drive device so that the level detected by the detection rod becomes a preset value. Leveling device.